Question

What is the product of the 2 solutions of the

equation x^2 + 4x - 21 = 0?
72 +41 – 21 = 0?

Answer 1

-21.

Explanation:

x^2 + 4x - 21 = 0

To factor this we need 2 numbers whose sum id + 4 and whose produce is -21.

These are - 3 and + 7 , so the factors are:

(x - 3)(x + & = 0

x = 3, -7.